ruby:
  layout 'views/examples/_layout.html'
  src = params['src'][/(\w+\.)?(\w+)$/, 0]
h2 source
code = file = Dir["views/examples/#{src}.*"].first
pre style="background-color:#122831;color:#B3B3B3;padding:1em;" =IO.read(file)
a href=(u=url("/examples/#{src}")) = u
iframe src=u width="100%"

